Vertical mount temperature measurement incorrect.
I seem to have hit the same problem that others in the forum mention. That is my tado TRV thinks the room has reached the temperature when it is actually measuring the radiator temperature. The rest of the room is cold (measured with another temperature sensor). The offset temperature seems to be a poor choice as it looks like it needs to be dynamic and setting it only once confuses the room temperature measurement.
I read some of the solutions as it is better to mount the TRV in horizontal position which makes it move somewhat away from the radiator. Is this something that would work or is it a half-measure too? I can check with a local plumber to change the mounting if this solves the issue.